Was he looking at pron? lol jk
Did you ask him what he was doing, maybe he bricked it, if thats even possible for a laptop.
But nothing happens at all? Have you tryed everything, removing the battery, holding power or reset, shaking it lol?
I was going to say reinstall the OS but there is no screen.
When you plug it in, do you here any fans turn on, or when you push power are there any fans or bootup noises?